中文摘要：

使用缩放和非线性拟合的方法,获得了3岁儿童颈部材料参数;提出了一套儿童颈部韧带的力学特性缩放方法;开发了具有精确几何及解剖学结构的3岁儿童C4-C5颈椎段有限元模型,并在准静态、动态拉伸载荷下进行了验证.结果显示,准静态拉伸刚度为211.8N/mm,动态拉伸最终失效力为759.9N,最终失效位移为5.083mm,均与实验值吻合良好;动态拉伸力-位移曲线与实验曲线吻合较好.验证结果表明,本模型能够较准确地反映3岁儿童C4-C5颈椎段的准静态和动态拉伸力学特性,具有较高的生物逼真度.

英文摘要：

Based on scaling and nonlinear-fitting methods, the material properties of the 3-year old ped- iatric cervical spine were acquired. A specific scaling method for the mechanical properties of the pediatric cervical ligaments was proposed, and the C4-C5 cervical segment finite element model for the 3-year old child was developed with accurate geometries and anatomical structures and validated under quasi-static and dynamic tensile loading. It was indicated that the simulation responses were consistent with those of experiments, with an quasi-static tensile stiffness of 211.8 N/ram, a dynamic tensile ultimate failure force of 759.9 N and an ultimate failure displacement of 5. 083 mm in simulations. In addition, the force-displacement curve in the dynamic tensile simulation was also similar to that of the experiment. It can be concluded that this model is able to reflect the quasi-static and dynamic tensile mechanical properties of 3-year old pediatric C4-C5 cervical segment with higher biofidelity.